Soal SMA · Soal cerita · Kesulitan 4/5
A school wants to form a committee of 3 students from a group of 5 boys and 4 girls. In how many ways can the committee be formed if it must include at least one girl?
- A.74
- B.84
- C.94
- D.104
Kunci jawaban & pembahasan
Jawaban: 74
Total ways to choose 3 from 9 = C(9,3)=84. Ways with no girls = C(5,3)=10. So at least one girl = 84-10=74. Thus, option A is correct.
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